Cooling means for engine structures and cylinder heads therefor



Feb. 7, 1933. 0 ENCER I 1,896,257

COOLING MEANS FOR ENGINE STRUCTURES AND CYLINDER HEADS THEREFOR Filed June 27, 1930 2 Sheets-Sheet 1 F/GJ.

FIG. 3..

NVE "TOR Feb. 7, 1933. Q SPENCER 1,896,257

COOLING MEANS FOR ENGINE STRUCTURES AND CYLINDER HEADS THEREFOR Filed June 27, 1950 2 Sheets-Sheet 2 Patented Feb. 7, 1933 QUNITED STATES PATENT OFFICE OWEN H. SPENCER, OF INDIANAPOLIS, INDIANA COOLING iunansron nnernn srnncrunns .Aivn CYLINDER HEADS 'rnnnnronl f Application filed June 27,

ing medium to both the interior and exterior of the engine structure and cylinder head,

from a single source of supply.

A further feature of the invention is the provision of means for directing air through a passage formed beneath the intake and exhaust channels of the engine head.

A further feature of the invention is the provision of means for forming a forced draft through the passages beneath the intake and exhaust channels.

A further feature of the invention is the provision of means for reinforcing the walls of the intake and exhaust channels.

Other objects and advantages will be hereinafter more fully set forth and pointed out in the accompanying specification.

In the accompanying drawings which are made a part of this application,

Figure 1 is a top plan View of an engine cylinder head.

Figure 2 is a sectional view thereof as seen along line 2-2, Fig. 1, showing the head attached to an engine.

Figure 3 is a detail sectional view as seen along line 33, Fig. 1, and,

Figure 4 is a sectional View as seen along line 4-4, Fig. 3.

Referring to the drawings in which similar reference numerals designate corresponding parts throughout the several views, the numeral 1 designates the cylinders of an engine, of the internal comb'ustion type, said cylinders having air inlet ports 2 and exhaust ports 3 in the lower portion therefor, which are controlled by means of pistons 4. The air is fed to the ports 2 from an air supplying manifold 5, the air on leaving the manifold passing through an air chamber 6 before communicating with the ports 2, while the exhaust passes from the ports 3 into an exhaust manifold 7 At the upper end of each cylinder of the engine is a head 8, in which is mounted a fuel control valve 9 and an exhaust valve 10, fuel 1930. Serial No; 464,330. 1

being conveyed to the port 11, controlled by thevalve 9, through a channel12, while the exhaust from 'the port'13, con't'rolledb'y' the valve 10, isfconveyed to the manifold 7, through a channel 14.

the ports '11 and 13 are substantially at" the axial center of the head 8and as thech-an- Y nels "1 2 and l'extend from the portsll and 13 to pointsgbeyond the edge of the head 8, an air'passa'ge 15 is formed between the head proper and'the walls" of thechannels 12 and 14, through which a current of air passes for cooling the headat this point and thus maintain that portion of the head below thechannels' at substantially thesame temperature as the remainder of the head.

The-heads 8 are se'cured'totheir respective cylinders by means of hollow bolts'16, the lower ends of which extend downwardly throughopeningsfl in thehead and are threaded into sockets18 orithe cylinders 1,

theoute'r ends of-the bolts being alsothreaded to receive nuts 19. As a bolt/16 passesbetween the channels12 and 14 andone atjthe outer edges of said channels, reinforcing ribs .20are'extended betweenthe iunder faces of the1ch'annels12- and-14m the adjacent portion of the head 8,-said'r'ibs' being on opposite sides of the path of the bolt 16 passing between the channels so as not to interfere with the free passage of air "through the air passage 15.

These ribs receive the strain incident to the-' tightening of thenuts19 on the bolts "16 and preventbending or yiel the channels12'and 14:; k V

The innerends-ofthe bolts 16 communicate ding of 'the'walls of with a jacket 21, formed around the cylinder 1, adjacent the upper end thereof, so that a current air will be passing outwardly through the hollow bolts when the engine is running thusmaterially aiding in cooling the cylinder-head and parts associated therewith andby forming a port 22 in the bolt 16 passing between the'channels 12 and 14:, an air current is induced through the air passage 15.

A current ofainis conducted from the manifold 5;to the jacket 21 through theimedium of a pipe '23, and so longas'the air charging rriecha'nism- 245 is in action, for supplying airto the ports2 a constant flow of air will be directed through the jacket 21 and bolts 16.

In addition to cooling the engine at the points receiving the maximum heat by passing air through the jacket 21, the air escaping from the outer ends of the bolts 16 will flow over the exterior of the engine and aid therein, curved and substantially parallel channels communicating with said ports, and an air passage formed between-said channels and the:contiguous parts of the cylinder head.

3. In a-cooling means for engines, a cylinder liead having an intake and exhaust port therein, substantially parallel channels communicating with said ports, an air passage formed between said channels and the contiguous parts of the cylinder head.

4. In acooling means for engines, a cylinder head having an intake and an exhaust port therein, substantially parallel channels communicating with said ports, an air passage formed between said channels and the contiguous portions of the head, members spanned between said channels and said head, apart from the j unctures of said channels and heads, whereby said channels are reenforced without obstructing the movement ofair at said juncture.

5. In a cooling means for engines, a cylinder head having an intake and exhaust port therein, channels communicating with said ports, an air passage formedbetween said. channels and the contiguous portions of the head, members spanned between said channels and said head, apart from the junctures of said channels'and heads, whereby said chan-' nels are reenforced without obstructing the movement of air at said juncture.

6. In a cooling means for engines, a cylin- 7 der head construction having an intake and anexhaust port therein, external air tributary means associated with said structure for cooling same, channels communicating with said ports, an a1r passage between said channels and the contiguous parts of the cylinder head, and means for inducing draft through said passage andtributary means from a common source. V

7. .Ina coolingmeansfor engines, a-cylinder having anair inlet adjacent its lower end, an external air enclosure associated with the wall ofsaid cylinder, means for supplying air to the exterior of said cylinder, and to said a single source of supenclosure and said air inlet from a common source.

8. The combination with the cylinder and head construction of an internal combustion engine, with an external duct and external tributaries leading therefrom associated with the wall of such construction, anda means for v directing air to theiinterior of the combustion portion of such construction and to said duct from a common source, for cooling such construction- V In testimony whereof, I have hereunto set my hand on this the 26th dayof June, 1930.

OWEN II. SPENCER. 

